body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f4f4f4;
}

#content {
    padding: 20px;
    background: #fff;
    max-width: 800px;
    margin: 20px auto;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
